The O-Ring, cataloged under National Stock Number 5331-01-078-4501, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is B.m.d. S.p.a.. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-078-4501 |
| Primary Part Number | A3085384 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | B.m.d. S.p.a. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.095 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN |
| Material | RUBBER SILICONE CLASS Q |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A3085384 | B.m.d. S.p.a. (ITA) |
| Reference | Meaning |
|---|---|
| 28-00153-002 | 5/9 Secondary reference Raytheon Company |
| 100S045 | 3/2 Design control — primary reference U.S. Government activity |
| A308 5384 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5331-01-078-4501 is a O-Ring, manufactured by B.m.d. S.p.a., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-078-4501 has 1 manufacturer part number on file: A3085384 (B.m.d. S.p.a.).
Key specifications for A3085384: Cross-Sectional Height: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN; Center Hole Diameter: 0.095 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN; Material: RUBBER SILICONE CLASS Q. 3 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.